Patents by Inventor Nikolai M. Denisjuk

Nikolai M. Denisjuk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for producing phenol foam plastic
    Patent number: 4221873
    Abstract: A method for producing a phenol foam plastic, consisting in that polycondensation of phenols with formaldehyde is conducted with simultaneous foaming and curing in the presence of a foaming agent and an acid or alkaline catalyst. Used as the phenols are pyrocatechol, hydroquinone, resorcinol, 5-methyl resorcinol, shale alkyl resorcinols, shale total phenols, or various combinations of said phenols. The method is simple and permits obtaining a foam plastic with improved physico-mechanical properties.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: September 9, 1980
    Inventors: Leonid V. Volodko, Mikhail A. Ksenofontov, Ljudmila E. Ostrovskaya, Galina G. Dzivitskaya, Igor D. Goretsky, Vasily M. Khoruzhy, Nikolai M. Denisjuk, Anatoly Y. Volokh, Oleg N. Pogorelsky